i fitted the engine after i bought my car...ived change my oil already with the same brand..Mobil1 fully synthetic oil,oil level is at the full level..but still its the same problem..toyota here in the philippines cant help me because im the only person here who has this kind of engine..i brought it once in the toyota service center, but they dont have the code of my engine in their computer...i bought my engine from japan then imported it here in the philippines...